discuri in miscare de rotatie
English translation: rotating discs
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| 06:54 Feb 17, 2004 |
| Romanian to English translations [PRO] Mechanics / Mech Engineering | |||||||
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|  Selected response from: Lydia Molea Germany Local time: 23:16 | ||||||
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| 3 +1 | rotating discs |
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| 4 | discs in rotation |
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Answers
18 mins confidence: 
peer agreement (net): +1
peer agreement (net): +1rotating discs Explanation: I think in English "rotating" already implies that they are moving. |
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2 hrs confidence:
discs in rotation Explanation: This time, let us consider a homogeneous disc in rotation. We can show that on Earth the degravitational term (in m/s2) is given by the approximate formula ad=ct.(N.R)2, with ct=(pi)3.10-7 in terrestrial condition, N numbers rotation a second, and R radius of the disc. For a homogeneous disc of 1m radius, revolving at 100_rotations_per_second (6000_rpm), then ad=0.031_m/s2 (ad= 0.015_m/s2 if the axis of rotation of the disk is at an angle of 90°). These values are easily measurable in a laboratory. Then we can lightly check at the same time, the validity of the degravitation theory, and its application to the rotational movements. While we are on the subject, we note that some old experiences about a similar theme, produce illogical results due to unsuitable protocol of experiences (14 & 15)... |
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